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Lines Matching refs:ref

58  * @ref_hash: Hash tables of ref objects, one per ttm_ref_type,
59  * for fast lookup of ref objects given a base object.
112  * @head: List entry for the per-file list of ref-objects.
114  * @kref: Ref count.
116  * @obj: Base object this ref object is referencing.
118  * @ref_type: Type of ref object.
123  * a particular ttm_object_file. It also carries a ref count to avoid creating
124  * multiple ref objects if a ttm_object_file references the same base
307  * ttm_ref_object_exists - Check whether a caller has a valid ref object
321 	struct ttm_ref_object *ref;
328 	 * Verify that the ref object is really pointing to our base object.
329 	 * Our base object could actually be dead, and the ref object pointing
332 	ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
333 	if (unlikely(base != ref->obj))
337 	 * Verify that the ref->obj pointer was actually valid!
340 	if (unlikely(kref_read(&ref->kref) == 0))
357 	struct ttm_ref_object *ref;
377 			ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
378 			if (kref_get_unless_zero(&ref->kref)) {
388 		ret = ttm_mem_global_alloc(mem_glob, sizeof(*ref),
392 		ref = kmalloc(sizeof(*ref), GFP_KERNEL);
393 		if (unlikely(ref == NULL)) {
394 			ttm_mem_global_free(mem_glob, sizeof(*ref));
398 		ref->hash.key = base->handle;
399 		ref->obj = base;
400 		ref->tfile = tfile;
401 		ref->ref_type = ref_type;
402 		kref_init(&ref->kref);
405 		ret = drm_ht_insert_item_rcu(ht, &ref->hash);
408 			list_add_tail(&ref->head, &tfile->ref_list);
419 		ttm_mem_global_free(mem_glob, sizeof(*ref));
420 		kfree(ref);
429 	struct ttm_ref_object *ref =
431 	struct ttm_base_object *base = ref->obj;
432 	struct ttm_object_file *tfile = ref->tfile;
436 	ht = &tfile->ref_hash[ref->ref_type];
437 	(void)drm_ht_remove_item_rcu(ht, &ref->hash);
438 	list_del(&ref->head);
441 	if (ref->ref_type != TTM_REF_USAGE && base->ref_obj_release)
442 		base->ref_obj_release(base, ref->ref_type);
444 	ttm_base_object_unref(&ref->obj);
445 	ttm_mem_global_free(mem_glob, sizeof(*ref));
446 	kfree_rcu(ref, rcu_head);
454 	struct ttm_ref_object *ref;
464 	ref = drm_hash_entry(hash, struct ttm_ref_object, hash);
465 	kref_put(&ref->kref, ttm_ref_object_release);
472 	struct ttm_ref_object *ref;
487 		ref = list_entry(list, struct ttm_ref_object, head);
488 		ttm_ref_object_release(&ref->kref);